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    JavaScript

    Last updated: 2021-06-24 18:06:22
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      Overview

      This document describes how to use the application-enabled authentication mode for the authentication management of your APIs in JavaScript.

      Directions

      1. Create an API in the API Gateway console, and select “Application-Enabled” as the authentication type. For details, see API Creation Overview.
      2. Publish the service to which the API belongs to the release environment. For details, see Service Release and Deactivation.
      3. Create an application on the Application page.
      4. Select the application you created in the application list and click Bind API. In the pop-up window, select a service and an API, and click Submit. Then you can bind the selected API to the application.
      5. Generate signing information in JavaScript by referring to the Sample Code.

      Environmental Dependencies

      API Gateway provides sample codes with the request body in JSON format and form-data format. Please select as needed.

      Notes

      Sample Code

      Sample codes with the request body in JSON format

      const https = require('https')
      const crypto = require('crypto')

      // Application ApiAppKey
      const apiAppKey = 'APIDLIA6tMfqsinsadaaaaaaaapHLkQ1z0kO5n5P'
      // Application ApiAppSecret
      const apiAppSecret = 'Dc44ACV2Da3Gm9JVaaaaaaaaumYRI4CZfVG8Qiuv'

      const dateTime = new Date().toUTCString()
      const body = {
        arg1: 'a',
        arg2: 'b',
      }
      const md5 = crypto.createHash('md5').update(JSON.stringify(body), 'utf8').digest('hex')
      const contentMD5 = Buffer.from(md5).toString('base64')
      const options = {
        hostname: 'service-xxxxxxxx-1234567890.gz.apigw.tencentcs.com',
        port: 443,
        path: '/data',
        method: 'POST',
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/json',
          'Content-MD5': contentMD5,
          'Content-Length': JSON.stringify(body).length,
          'x-date': dateTime,
        },
      }

      const signingStr = [
        `x-date: ${dateTime}`,
        options.method,
        options.headers.Accept,
        options.headers['Content-Type'],
        contentMD5,
        options.path,
      ].join('\n')
      const signing = crypto.createHmac('sha1', apiAppSecret).update(signingStr, 'utf8').digest('base64')
      const sign = `hmac id="${apiAppKey}", algorithm="hmac-sha1", headers="x-date", signature="${signing}"`
      options.headers.Authorization = sign

      const req = https.request(options, (res) => {
        console.log(`STATUS: ${res.statusCode}`)
        res.on('data', (chunk) => {
          console.log('BODY: ' + chunk)
        })
      })
      req.on('error', (error) => {
        console.error(error)
      })
      req.write(JSON.stringify(body))
      req.end()

      Sample codes with the request body in form-data format

      const https = require('https')
      const crypto = require('crypto')
      const querystring = require('querystring')

      // Application ApiAppKey
      const apiAppKey = 'APIDLIA6tMfqsinsadaaaaaaaapHLkQ1z0kO5n5P'
      // Application ApiAppSecret
      const apiAppSecret = 'Dc44ACV2Da3Gm9JVaaaaaaaaumYRI4CZfVG8Qiuv'

      const dateTime = new Date().toUTCString()
      const body = {
        arg1: 'a',
        arg2: 'b',
      }
      const contentMD5 = ''
      const options = {
        hostname: 'service-xxxxxxxx-1234567890.gz.apigw.tencentcs.com',
        port: 443,
        path: '/data',
        method: 'POST',
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/x-www-form-urlencoded',
          'x-date': dateTime,
        },
      }

      const sorted_body = sortBody(body)
      const signingStr = buildSignStr(sorted_body)
      const signing = crypto.createHmac('sha1', apiAppSecret).update(signingStr, 'utf8').digest('base64')
      const sign = `hmac id="${apiAppKey}", algorithm="hmac-sha1", headers="x-date", signature="${signing}"`

      options.headers.Authorization = sign

      // Send the request
      const req = https.request(options, (res) => {
        console.log(`STATUS: ${res.statusCode}`)
        res.on('data', (chunk) => {
          console.log('BODY: ' + chunk)
        })
      })
      req.on('error', (error) => {
        console.error(error)
      })
      req.write(querystring.stringify(body))
      req.end()

      function sortBody(body) {
        const keys = Object.keys(body).sort()
        let signKeys = []
        for (let i = 0; i < keys.length; i++) {
          signKeys.push(keys[i])
        }
        // Sort in lexicographical order
        return signKeys.sort()
      }

      function buildSignStr(sorted_body) {
        const keyStr = sorted_body
          .map((item) => {
            return `${item}=${body[item]}`
          })
          .join('&')
        return [
          `x-date: ${dateTime}`,
          options.method,
          options.headers.Accept,
          options.headers['Content-Type'],
          contentMD5,
          options.path + '?' + keyStr,
        ].join('\n')
      }
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